The genuine XCMG 380500609 Shaft Seal (75×100×10 mm) is a premium radial lip seal engineered for rotating shafts on XCMG GR series motor graders. This OEM seal prevents leakage of engine oil, transmission fluid, differential oil, and grease from hubs and gearboxes while excluding dirt, water, and contaminants. Manufactured from high‑grade nitrile rubber (NBR) with a precision‑formed steel outer case and a garter spring‑loaded sealing lip, the 380500609 shaft seal provides reliable, long‑life service in demanding construction environments. The seal dimensions – 75 mm inner diameter, 100 mm outer diameter, and 10 mm width – are standard for final drive pinion shafts, transmission output shafts, and front axle hub applications on GR135, GR165, GR180, GR215, GR260, GR300, GR350 and GR2003 motor graders.
The 380500609 seal features a dual‑lip design with a primary sealing lip and a secondary dust lip, offering enhanced protection in dusty grading conditions. The garter spring maintains constant radial force on the shaft, compensating for minor wear and thermal expansion. The steel case is coated with a rust‑inhibiting finish and designed for press‑fit installation into a housing bore with a standard tolerance H8.
A worn or damaged shaft seal leads to oil leaks, contamination of brake components, and potential bearing failure. Replacing a leaking seal with genuine XCMG 380500609 restores hydraulic integrity, prevents environmental pollution, and extends drivetrain life. Keep spare seals in your parts inventory for rapid field repair of axle or transmission leaks.
| Parameter | Specification |
|---|---|
| OEM Number | 380500609 |
| Brand | XCMG (Genuine Original Equipment) |
| Product Type | Radial Shaft Seal / Oil Seal (Rotary) |
| Inner Diameter (d) | 75.00 mm ±0.15 mm |
| Outer Diameter (D) | 100.00 mm ±0.20 mm |
| Width (B) | 10.00 mm ±0.15 mm |
| Lip Material | Nitrile rubber (NBR) 70 Shore A, temperature -40°C to +125°C |
| Case Material | Cold‑rolled steel (DC01), zinc‑plated with trivalent chromate |
| Spring Material | Carbon spring steel (ASTM A228), zinc‑plated |
| Sealing Lip Design | Single primary lip + dust lip (dual‑lip configuration) |
| Garter Spring | Continuous coil, stainless steel or carbon steel |
| Maximum Shaft Speed | 3,500 rpm (for NBR) |
| Maximum Pressure (static) | 0.05 MPa (0.5 bar / 7.25 psi) – not for high pressure |
| Fluid Compatibility | Engine oil, gear oil, ATF, grease, diesel, coolant |
| Shaft Hardness (recommended) | ≥55 HRC (induction hardened) with Ra 0.2–0.8 μm finish |
| Housing Bore Tolerance | ISO H8 (100.000 mm +0.054/0) |
| Standards | ISO 6194, DIN 3760 type A, SAE J110 |
| Compatible Models | XCMG GR135, GR165, GR180, GR215, GR260, GR300, GR350, GR2003 |
| Superseded Part Numbers | 380500178, 380500345, 380500488, 380500599 |
The 380500609 shaft seal is installed on rotating shafts that exit gear housings, such as the final drive pinion shaft, transmission output flange, and front axle hub spindle. Its primary function is to retain lubricating oil inside the housing while preventing external contaminants from entering. A leaking seal allows oil to escape, leading to low oil levels that can destroy bearings and gears within hours of operation.
On XCMG GR graders, this seal is commonly used on the tandem drive axle input shaft and differential side shafts. Leaks in these locations can contaminate brake discs, causing brake fade and unsafe operation. The dust lip of the 380500609 seal is especially important in grading environments where fine dust and sand are constantly present – it keeps abrasive particles away from the primary sealing edge.
Over time, the seal lip wears a groove into the shaft surface, reducing sealing effectiveness. Regular inspection of the shaft surface and seal condition is essential. Replacing both the seal and the shaft wear sleeve (if applicable) with genuine 380500609 components restores oil‑tight integrity and prevents recurring leaks.
XCMG selects premium nitrile rubber compound for the 380500609 seal, optimized for a wide temperature range and resistance to petroleum‑based oils. The compound is mixed, milled, and then compression‑molded to form the sealing lip and outer cover. The lip is then precision‑ground to a specific angle (typically 30° to 45° relative to the shaft axis) for optimal oil pumping action.
The steel case is stamped from high‑quality cold‑rolled strip and then zinc‑plated to prevent corrosion. The outer diameter is machined with a slight lead‑in chamfer to ease installation. The garter spring is manufactured from stainless or carbon spring wire, wound to exact tension, and then closed to prevent snagging during assembly. Each spring is checked for consistent force.
After assembly, every 380500609 seal is 100% visually inspected for molding defects, spring placement, and lip integrity. Random samples are tested on a dynamic test rig rotating at 3,000 rpm with oil at 120°C for 500 hours. Genuine XCMG seals show zero leakage and less than 0.05 mm lip wear after test. This rigorous quality assurance guarantees field reliability.
Before installing a new 380500609 seal, inspect the shaft surface for grooves, scoring, or rust. The shaft must be in excellent condition – any wear groove deeper than 0.2 mm requires installation of a speedi‑sleeve or shaft replacement. The shaft surface finish should be Ra 0.2–0.8 μm (ground and polished). Use fine emery cloth to remove burrs, then clean with solvent.
Clean the housing bore thoroughly and apply a thin film of oil to the outer diameter of the seal to prevent dry installation. Use a seal installation tool or a flat drift that contacts only the rigid outer case – never hammer on the seal lip or spring. Press the seal squarely into the bore until it seats against the shoulder. The seal must not be cocked.
Before installing the shaft, lubricate the seal lip and shaft with clean oil. Carefully guide the shaft through the seal without damaging the lip. Once assembled, rotate the shaft by hand to check for smooth rotation. Fill the housing with recommended oil and run the machine at idle for 10 minutes, then inspect for leaks. Keep spare 380500609 seals in your workshop for emergency transmission or axle repairs.
Aftermarket shaft seals often use low‑grade rubber that hardens quickly or swells in hot oil, leading to immediate leakage after a few hundred hours. Many have incorrect lip geometry or spring tension, causing either high friction (overheating) or insufficient contact (leakage). Genuine XCMG seals maintain consistent sealing force over the entire service life.
Counterfeit seals may have a steel case that is not accurately sized, resulting in a loose fit that allows the seal to spin in the bore – this wears the housing and causes catastrophic leakage. Some have no dust lip, allowing dirt to lap the primary lip. The genuine 380500609 includes a molded dust lip that prolongs seal life in dusty grading conditions.
XCMG provides a 12‑month warranty against manufacturing defects. Each genuine seal is packed in a labeled, anti‑contamination bag with the OEM number and batch traceability. Using OEM seals prevents oil waste, environmental fines, and costly drivetrain rebuilds. Always invest in genuine XCMG sealing components for critical rotating shafts.
Visible oil drips from the bottom of the axle housing or transmission, oil stains on the inside of the tire rim, and a drop in oil level between service intervals are clear signs. Also, a burning smell from oil leaking onto hot exhaust components, or oil contamination of brake linings causing reduced braking performance, indicate seal failure.
Preventive replacement is recommended every 3,000 operating hours or during any axle or transmission overhaul. If the seal is removed for access (e.g., to replace a bearing), always install a new 380500609 seal – never reuse a seal that has been pressed in and removed. The cost of a genuine seal is minimal compared to the damage from oil starvation.
During every 1,000‑hour service, inspect the area around the seal for dampness. Wipe the area clean and run the machine for 30 minutes, then re‑inspect. Any fresh oil film indicates the need for seal replacement. Keep a stock of 380500609 seals in your service truck to perform immediate field repairs when leaks are detected.
The XCMG 380500609 Shaft Seal is stocked in regional distribution centers: Houston (USA), Rotterdam (Netherlands), Dubai (UAE), and Shanghai (China). Standard air freight delivers within 2–5 business days worldwide. Expedited courier (DHL/FedEx) provides 1–2 day delivery for urgent axle or transmission repairs. Bulk orders of 25+ seals receive volume discounts and can be shipped by sea freight.
Each seal is individually packed in a sealed anti‑contamination bag and placed in a crush‑proof cardboard box. For fleet customers, consignment stock programs ensure immediate availability. Our logistics team provides real‑time tracking and customs documentation support for international shipments.
Don’t let a leaking shaft seal contaminate your grader’s brakes or cause bearing failure. Order the genuine XCMG 380500609 Shaft Seal 75×100×10 today and restore leak‑free operation on your motor grader. This small component is critical for drivetrain reliability and environmental compliance. Keep several seals in your parts inventory for rapid replacement.
Upgrade your grader’s sealing system with XCMG genuine radial shaft seals. Engineered for high‑speed rotation, oil resistance, and dust exclusion. Use the buttons above to request a quote or email our parts specialists. Maintain clean, safe, and productive grading – choose 380500609 OEM seal.
